Spraying apparatus.



No. 679,504. Patented July 30, I91". W. H. HEARD.

SPBAYING APPARATUS.

(Application filed Dec. 81, 1900.)

\No Model.) 2 Sheets-Shnt I.

W6 01 Q88 88 [fa n (or No. 679,504. Patented My 30, 190i.

W. H. HEARD.

SPBAYING APPARATUS.

(Application filed Dec. 31, 1900.) (No Model.) 2 Shanta-Sheet 2.

WiOzea-s ea [20 enior m: mums warms cu. mormuma, wasnmaromu c.

NiTn STATES PATENT OFFICE.

IVILLIAM HENRY HEARD, OF LONDON, CANADA.

SPRAYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 679,504, dated July 30, 1901.

Application filed December 31, 1900. Serial No. 41,601. (No model.)

To aZZ whom it may concern.-

Be it known that LWILLIAM HENRY HEARD, plumber, of the city of London, in the county of Middlesex, Province of Ontario, Canada, have invented certain new and useful Improvements in Spraying Apparatus, of which the following is a specification.

The object of my invention is to devise means for producing a spray of oil mixed with water in which a given proportion of oil to water is maintained with greater accuracy than is now possible and in which the percentage of oil may be easily regulated within a wide range. I achieve this object by employing separate pumps for the oil and the water so coupled that they may both be operated from the handle of one pump and by keeping the discharge-pipes for the oil and the water separate from one another till they reach a point in immediate proximity to the spraynozzle, where the oil and water are mixed and discharged through the nozzle.

My invention further relates to a coneshaped wind-shield connected to the nozzle, and to certain improvements in the construction of a knapsack form of the apparatus, substantially as hereinafter more specifically described and then definitely claimed.

Figure 1 is a sectional elevation of my improved apparatus. Fig. 2 is a plan view showing the arrangement of the tanks for the liquid and their covering-plates.

In the drawings like letters of reference indicate corresponding parts in both figures.

A is the main tank, and B a supplemental tank. The main tank is illustrated in the form of a knapsack-tank, with the supplemental tank secured in position behind it; but of course any other forms of tank may be employed. Located within the main tank A is the pump 0, of substantially the same construction as that illustrated in my prior United States Patent No. 654,151. Within the tank B is located the pump D, substantially similar to the pump 0, but without the agitator, which, as the pump is intended principally to work on oil or some other homogeneous liquid, is unnecessary.

E is the operating-handle of the pump 0, suitably pivoted at a to the top of the airchamber F. This handle is preferably formed double or split, as indicated, and extends forwardly in a horizontal direction.

G is the operating-handle of the pump D, pivoted at b to the air-chamber H and extend ing forward over the handle E, to which it is connected by the pivoted link I.

The plunger-rods J and K of the pumps are preferably provided with T-heads 0, provided with a series of small holes (1. Corresponding holes are provided in the handles, so that by means of the pins 6, passed through the holes in the handles and the T-heads, the pivot-points of the plunger-s on the handles may be shifted closer to or farther from the pivot-points a and b of the handles on the airchambers. The advantage of this construction is that smaller slots are required in the plates L and M than for the mode of connection illustrated in the prior patent referred to, in which the plunger-rod must be swung backward or forward to find a fresh point of attachment to the handle.

N and O are the discharge-pipes of the pumps 0 andD, respectively. The pipe 0 communicates through the stop-cock h with the interior of the small pipe g. The discharge-pipe N communicates with the interior of the large pipe 2', surrounding the pipe g, through the stop-cock f. These pipes eX-- tend up within the body of the drip-cap P, which is substantially of the construction shown in my prior patent.

Within the body of the drip-cap is formed the mixing-chamber Q. As the small pipe g stops short before entering this chamber, the oil or other liquid flowing through it is compelled to mix with the liquid coming up through the large pipe 1' within this mixing chamber. In order to insure a thorough mixing of the two liquids, I prefer to insert the perforated diaphragm j in the mixing-chamber. The liquids in passing through this perforated diaphragm are very intimately mixed before passing to the spray-nozzle R, which is screwed into the upper end of the drip-cap. Below the nozzle I screw on the base of the shield S. This shield is sufficiently large to surround the spray-nozzle and the cone of spray issuing therefrom. Its proportions may vary; but it should be of sufficient length to reach from the nozzle almost to the point of application of the spray, usually about eighteen or twenty inches, and of sufficient diameter to avoid contact with the spray itself as much as possible. The ends of the disgorgers of the nozzle may pass through apertures in the base of the shield, as indicated in the drawings. I find that by the use of such a shield the waste of material caused by the action of wind is entirely obviated.

From the construction described it is evident that as long as the handle E is operated an unvarying proportion of water and oil or other liquid will be supplied to the spray-nozzle in a properly-mixed condition.

It is found that it is impossible to spray a mechanical mixture of crude petroleum and water if they are permitted to mix before reaching the point of formation of the spray, for the reason that if the motion of the pumps is stopped even for an instant the mixed oil and water will separate so that alternate doses of pure water and pure oil are discharged from the spray-nozzle instead of the mixture desired. It is for this reason that I keep the two liquids entirely separate till they come together in the mixing-chamber. I find this mixing-chamber of importance, as if the oil and water be led directly to the nozzle there is a danger of the two not always preserving an unvarying proportion in the spray. When they are forced through the mixing-chamber and then through its perforated diaphragm, they are forced into such intimate mixture that the spray is for all practical purposes of identical composition while the machine is in operation. If it be desired to vary the proportions of oil and water, the plunger-rods of one or both pumps may be adjusted on the handles, as already described. By this means I find that I can secure a mixture of oil and water in which the proportion of oil varies from about one to ninety per cent.

It is desirable in a knapsack apparatus that it shall be possible for the operator to use either hand for pumping. In order to accomplish this, it is necessary that it be possible to swing the pump-handle so that it will go over either shoulder. I accomplish this result by pivoting the plate L upon the tank A at the point Z. This plate, as in my prior patent, is clamped about the air-chamber and discharge-pipe of the pump 0. In the top of the tank I cut an opening mand make the plate L of sufficient width to cover the opening when the operating-handle is swung to the desired limit in either direction. In order to hold down in position the front edge of the. plate L, I provide one or more clips 12.,

which are secured to the top of the tank and extend over the upper surface of the plate. (See Fig. 2.) As the operating-handles of the two pumps must swing together and the pumps therefore always remain in line one behind the other, it is necessary to pivot the tank B upon the tank A, which is preferably" done at the pivot-point Z of the plate L, the plate M of the pump D being provided with a suitable lug for the purpose. The two tanks are also pivoted together at o in line with the pivot-point Z.

From the construction described it follows that the handles and pumps are always in line, no matter in what direction the handle E may be swung.

To prevent liquid being splashed up out of the opening in the tank A, I surround the said opening with the downwardly-depending apron T, which efi'ectually accomplishes the object. I also provide the slots 19 in the plates L and M with similar aprons U and U, which prevent the splash of liquid out through these slots.

What I claim as my invention is 1. In spraying apparatus the combination of two separate tanks to contain liquids; a pump for each tank; means for operating the pumps simultaneously; a spray-nozzle; and separate discharge-pipes for the pumps communicating with one another in immediate proximity to the spray-nozzle, substantially as and for the purpose specified.

2. In spraying apparatus the combination of two separate tanks to contain liquids; a

pump for each tank; means for operating the.

pumps simultaneously; aspray-nozzle; separate dischargapipes for the pumps communicating with one another in immediate proximity to the spray-nozzle; and means for adjusting the relative action of the said pumps,

. substantially as and for the purpose specified.

3. In spraying apparatus the. combination of a spray-nozzle; two separate tanks for liquids; two independent conduits for liquid extending from the said tanks to the spraynozzle and means for simultaneously forcing liquids from the said tanks independently through the said conduits, substantially as and for the purpose specified.

4:. In spraying apparatus the combination of two separate tanks to contain liquids; a pump for each tank; means for operating the pumps simultaneously; a mixing-chamber; a nozzle communicating directly with the said chamber; and separate discharge-pipes for the pumps communicating with the interior of the said mixing-chamber, substantially as and for the purpose specified.

5. In spraying apparatus the combination of two separate tanks to contain liquids; a pump for each tank; means for operating the pumps simultaneously; a mixing-chamber; a nozzle communicating directly with the said chamber; a perforated diaphragm between the mixing-chamber and the nozzle; and separate discharge-pipes for the pumps communieating with the interior of the said mixingchamber, substantially as and for the purpose specified.

6. In a spraying apparatus a tank for liquids having an opening in the top; in combination with a plate covering the said opening and pivoted upon the tank behind it; a pump extending through the said plate and secured thereto and an operating-handle for the said pump extending forward in a generally horizontal direction, substantially as and for the purpose specified.

7. In a spraying apparatus a tank for liquids having an opening in the top; in combination with a plate covering the said opening and pivoted upon the tank behind it; a pump extending through the said plate and secured thereto and an operating-handle for the said pump extending forward in a generally horizontal direction; asupplemental tank pivoted upon the aforesaid tank substantially on the same line of centers as the aforesaid plate; a pump secured in position in the said supple mental tank; an operating-handle for the pump extending forward over the handle of the first-mentioned pump; and a pivoted link connecting the said handles, substantially as and for the purpose specified.

8. In a spraying apparatus the combination of two separate tanks for liquids; a pump for each tank located one behind the other; an operating-handle for each pump each of said handles being pivoted at one end on a fixed part; and a link pivotally connecting the two handles which are arranged to operate in the same vertical plane, substantially as and for the purpose specified.

9. In a spraying apparatus the combination of a tank having an opening in its top or cover; a downwardly-extending apron surrounding the said opening; a plate movable over the said opening and a pump secured to the said plate, substantially as and for the purpose specified.

10. In a spraying apparatus the combination of a tank having an opening in its top or cover; a downwardly extending sleeve or flange surrounding the said opening; a slotted plate covering the said opening; and a downwardly-extending apron or flange surrounding the slot in the said plate, substantially as and for the purpose specified.

11. In a spraying apparatus a tank having an opening in its top or cover in combination with a slotted plate covering the said open ing; and a downwardly-extending apron or flange surrounding the slot in the said plate, substantially as and for the purpose specified.

12. In a spraying apparatus, the combination of a liquid-tank, two pumps for discharg ing the liquid, a pivoted handle, the plungerrod of one of said pumps having a T-head, a plurality of holes in said handle and head,- and a pin for connecting said handle with said T-head through any of said holes, substantially as described.

London, August 1, 1900.

WILLIAM HENRY HEARD.

Witnesses:

L. F. EDEN, WINAFRED REILLY, 

